Fig. 10 [3] shows that, as in the case of most open-end spinning processes, a single drawframe sliver (1) is passed via a feed device (2) to the opening roller (3), which opens the strand into individual fibers. A fan generates a partial vacuum (airstream 8) in the disc (4), and this draws the separated fibers onto the collection surface of the perforated disc (spinning disc 4). The open end of the yarn (5) is drawn by the suction into this spinning zone, which lies directly opposite the opening roller. The yarn continuously receives twist imparted to it by an external twist element (6), so that the open yarn end is continuously rolling on the perforated surface of the spinning disc.
This in turn causes rolling-in of fibers engaging the yarn end and hence leads to continuous yarn formation in accordance with the open-end spinning principle (Section 2.1.1). The yarn formed in this way simply has to be withdrawn by the withdrawal rollers (7) and wound up onto a cross-wound package.
It is an interesting feature of this process that collection and twisting of the fibers are separated. Each is performed by a different element. This makes it possible to use various types of twisting element. The process thus becomes very flexible. However, it has never advanced beyond the development stage.
Fig. 10 – The disc-spinning principle
